2.5-D approach in ray-based seismic wavefield modelling

Johana Brokesova

Summary

The paper deals with a new and very promising method of 2.5-D high-frequency modelling of seismic wavefields. The method consists in tracing 3-D rays through a 2-D structure (not varying in one direction). The 2.5-D approach is more efficient then 3-D modelling giving exactly the same results with no additional approximation. Basic theory is briefly described with the emphasis on certain differences and simplifications with respect to the fully general 3-D computations. The method is illustrated on one simple numerical example. A lot of possible applications are suggested.


In: Seismic Waves in Complex 3-D Structures, Report 1, pp. 45-60, Dep. Geophys., Charles Univ., Prague 1994.
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